Don't open that can of worms. Basically, there are people that "claim" to teach Kosen all over the world. I'll see if I can find you the thread debate. It gave me a headache and I can take all kinds of silliness.

I called Mo's Karate and spoke with the owner a few months back when this first hit Facebook. As far as the owner knows the guy has Judo credentials, but no BJJ belt rank that HE knows of.
That being said, I was unable to verify his Judo BB either with any of the governing bodies, but I might not have been looking at the right one since I'm not entirely sure what country he supposedly got his Judo BB in.